$font-family: 'PingFang SC', 'Lantinghei SC', 'Helvetica Neue', Helvetica, Arial,
  'Microsoft YaHei', 微软雅黑, STHeitiSC-Light, simsun, 宋体,
  'WenQuanYi Zen Hei', 'WenQuanYi Micro Hei', sans-serif;
$font-family-1: Roboto, $font-family;
$font-family-2: Proxima Nova, $font-family;
$mobile-max-width: 768px;